Depending on context may stand for 'Bad Ass' , 'Bachelard of
Art' or '
Breast Augmentation'. Honestly I have
never seen it to be used for 'bad ass' as everyone here seems to be suggesting but there you go.
What should be used for bloating/
constipation after BA (
breast augmentation) surgery?
You are a real BA (bad ass)
He has recently
finished his BA course in photography.